Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add OutlineDriven/odin-claude-plugin --skill libaflgit clone --depth 1 https://github.com/OutlineDriven/odin-claude-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/libafl)<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/libafl"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/libafl.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.01316 |
| Opus 5 | $0.00023 | $0.00658 |
| Sonnet 5 | $0.00009 | $0.00263 |
| Haiku 4.5 | $0.00005 | $0.00132 |
Grade A, and why
libafl scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LibAFL custom fuzzer composition
Contract
| Field | Bound contract |
|---|---|
| Trigger | User needs a custom LibAFL fuzzer, observer, feedback, mutator, scheduler, or executor composition. |
| Authority | Reversible local: writes named local Rust source artifacts, corpus entries, and objective findings under the output directory; rollback is deleting the generated crate, the output directory, or reverting VCS changes. No remote mutation. |
| Side effect | Local-write: creates or modifies Rust source files implementing the composed fuzzing engine and target integration, plus corpus entries and crash/timeout findings under the output directory. |
| Done | The composed LibAFL fuzzer compiles, runs the target, records coverage feedback, and persists objective findings to disk. |
Inputs
- Target: the function, binary, or harness to fuzz. Required.
- Components: which LibAFL modules to compose, at minimum an executor, observer, feedback, and mutator. Optional; defaults to a coverage-guided in-process fuzzer with
StdScheduledMutatorandHitcountsMapObserver. - Objective: the stopping condition or crash classification (e.g., timeout, crash, custom
ExitKind). Optional; defaults to crash detection. - Output directory: where corpus and findings persist. Optional; defaults to
./fuzz_out.
Procedure
-
Identify the target boundary. Determine the function signature or binary entry point to fuzz. Confirm the target accepts byte-slice input (
&[u8]) or can be wrapped in aBytesInputharness. Done when: the target boundary is identified and confirmed compatible with byte-slice input. -
Select the executor. Choose
InProcessExecutorfor in-process fuzzing orForkserverExecutor/CommandExecutorfor out-of-process.InProcessExecutorhas no crash isolation in-process; when crash handling is needed, selectInProcessForkExecutor, which forks per execution and catches crashes in the parent. Done when: one executor is selected and crash handling is configured.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 60 lines · 46 tokens per session scan A 339b3ec8984a
libafl is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (35 stars, last pushed yesterday), licensed Apache-2.0. It adds 46 tokens to every session and 1,316 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.
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